CVE-2023-25154

Cross site scripting (XSS) of ActivityPub URI in misskey

Description

Misskey is an open source, decentralized social media platform. In versions prior to 13.5.0 the link to the instance to the sender that appears when viewing a user or note received through ActivityPub is not properly validated, so by inserting a URL with a javascript scheme an attacker may execute JavaScript code in the context of the recipient. This issue has been fixed in version 13.5.0. Users are advised to upgrade. Users unable to upgrade should not "view on remote" for untrusted instances.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.23%
Vendor Advisory github.com
Affected: misskey-dev misskey
Published at:
Updated at:

References

Link Tags
https://github.com/misskey-dev/misskey/security/advisories/GHSA-pfp5-r48x-fg25 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-25154?
CVE-2023-25154 has been scored as a high severity vulnerability.
How to fix CVE-2023-25154?
To fix CVE-2023-25154, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-25154 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-25154 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-25154?
CVE-2023-25154 affects misskey-dev misskey.
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